Frank scripture



(No Model.)

1".--s0R1PTURE- DUMPING SCOW.

No. 335,316. Patented Feb. 2, 1886.

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UNITED STATES `ATENT FFTCE.

FRANK SCRIPTURE, OF ROOKPORT, MASSACHUSETTS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO HIM SELF AND JAMES S\VIFT ROGERS, OF SAME PLACE.

DUMPlNG-SCOW.

SPECIFICATION forming part of Letters Patent No. 335,316, dated February 2, 1886.

Application filed November 23, 1885i.

To all whom, it may concern.'

Be it known that I, FRANK SCRIPTURE, of Rockport, in the county of Essex, of the Com monwealth of Massachusetts, have invented a new and useful Improvement in Dumping- Scows: and I do hereby declare the same to be described in the following specification and represented inthe accompanying drawings, of which- Figure l is a top view; Fig. 2, a bottom view; Fig. 3, a longitudinal and median section; and Fig. 4, a transverse and median section of a scow having my invention, the nature of which is defined in the claims hereinafter presented. r

I n this scow the body A is chambered entirely around the hold I3, the latter being open at bottom. To the bottom of the body there is hinged a door, C, which has within it one or more air-tight chambers, a, to render it floatable, or to cause it to be self'closing immediately after a load may have been discharged from the hold through the bottom thereof. The said door has a series of notches or recesses, b, made in it, as shown, from its free longer edge, each of said notches being extended a short distance in rear of the next adjacent side of the hold. To the door, close to the rear part of each notch, one of a set of chains, d, is fastened. Each of these chains, prior to loading the scow, is to be hitched upon one of three hooks, e, projecting from three clutch-sections, @,fixed upon along shaft, d', supported in boxes c, fixed to the deck of the scow. Each box answers not only as a box to support the shaft, but as another and stationary clutch-section, it serving, when in engagement with its fellow or movable clutch-section c, to prevent the shaft d from 4o revolving. A lever, f, fulcrumed to the deck and furcated to extend into the groove g of a cylindrical h ead, h, fixed on the shaft d at one end thereof, serves to slide the shaft to engage and disengage the movable section of v each clutch with its fellow or stationary section.

On the scow being loaded and moved to a position for having the load discharged or dumped, the shaft d' is to be moved to disengage the movable clutch-sections from the stationary sections, which taking place the door Serial No. 183,701

(No model.)

with the load upon it will fall, the shaft will be revolved, the chains will be drawn olf the hooks, the load will bc discharged by its own gravity from the hold, after which the door will immediately turn upward to place, and the chains will be hanging down through the notches,which prevent such chains from being caught or pinched between the door and the bottom of the scow. Next, the shaft is to be 6o revolved laterally and moved endwise to bring the hooks into position to hook into the chains on their being raised upward for being hitched upon the said hooks.

In the above-described scow the hold-door has one or more air-chambers, so as to render it float-able, so as to canse it on being freed from a load to rise and close in the water on the scow being afioat. Furthermore, I usually have a mouth or opening to each of 7o such chambers, as shown at m, and to such mouth or opening a close-fitting stopper or door, n, such mouth or opening being to enable me to put through it into the chamber water or other matter or ballast, for the purpose of preventing the chamber-door from rising too quickly on the discharge of a load from the hold ofthe scow.

I claim-` l. A dumping-scow having to the open bottom of its hold a door hinged to the scow-body, and provided with one or more air-tight chambers to cause it when the scow is afloat and on a load being dumped therefrom to rise in the water and close the bottom ofthe hold, as Set forth.

2. rlhe combination, with the scow-body, of the floatable dooi, substantially as described, hinged at one edge to such body at the open bottom of its hold, and provided at its opposite edge with notches arranged in it, and with chains fixed to it immediately in rear of and close to such notches, all being substantially as set forth.

3. The combination of the rotary and sliding shaft supported in boxes, and provided with hocks and one or more clutches, as described, with the dumping-scow body and with the floatable door, essentially as described, of the hold thereof, hinged to such body, and provided with notches arranged init, as represented, and with chains IOO to engage with the said hooks, all being snbtherefrom, to rise in the Water and close the Stantially as set forth. bottom of the hold, all being Substantially as 4. A dumping-seow having to the open botset forth. tom of its hold a door provided With means FRANK SGRIPTURE. 5 to render it loatable, and hinged to the Witnesses:

scoW-body in order to cause such door when R. H. EDDY, the scow is atioat,a1id on a load being dumped R. B. TORREY. 

